Inductor detection method
(1) The manifestations of inductor damage: short circuit, open circuit, etc.
(2) Use a multimeter to judge the quality of the inductor.
The method of detecting the inductor with a pointer multimeter: first adjust the multimeter to the “R×1” gear of the ohm range, connect the two test leads to the two pins of the inductor, and a fixed resistance can be measured under normal circumstances. If the needle does not move, it means that the inductor is open. If the indicator of the needle tends to 0Ω, it means that there is a short circuit inside the inductor; then set the multimeter to the “R×10K” gear, check the insulation of the inductor, and measure the coil lead and iron The resistance between the core or the metal shield should be infinite, otherwise the inductor will have poor insulation; finally check the structure of the inductor. The winding of a good inductor should not be loose or deformed, and the terminal should be fixed firmly and magnetically. The core can be flexibly rotated without loosening, etc., otherwise the inductor may be damaged.
The method of digital multimeter to detect the inductor: set the range switch of the digital multimeter to the appropriate inductance gear; then connect the two pins of the inductor with two test leads to display the inductance of the inductor on the display. If the displayed inductance is close to the nominal inductance, it means that the inductor is normal; if the displayed inductance is much different from the nominal value, it means that the inductor is faulty.
(3) Generally damaged inductors should be replaced with inductors with nominal inductance and nominal current.
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